72224036872 has 32 divisors (see below), whose sum is σ = 145939069080. Its totient is φ = 33310840320.

The previous prime is 72224036851. The next prime is 72224036879. The reversal of 72224036872 is 27863042227.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 66299040196 + 5924996676 = 257486^2 + 76974^2 .

It is not an unprimeable number, because it can be changed into a prime (72224036879) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 93279 + ... + 391342.

Almost surely, 2^72224036872 is an apocalyptic number.

It is an amenable number.

72224036872 is an abundant number, since it is smaller than the sum of its proper divisors (73715032208).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

72224036872 is a wasteful number, since it uses less digits than its factorization.

72224036872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 486073 (or 486069 counting only the distinct ones).

The product of its (nonzero) digits is 451584, while the sum is 43.

The spelling of 72224036872 in words is "seventy-two billion, two hundred twenty-four million, thirty-six thousand, eight hundred seventy-two".